CVE-2021-47455 (GCVE-0-2021-47455)

Vulnerability from cvelistv5 – Published: 2024-05-22 06:19 – Updated: 2025-11-03 17:30
VLAI?
Title
ptp: Fix possible memory leak in ptp_clock_register()
Summary
In the Linux kernel, the following vulnerability has been resolved: ptp: Fix possible memory leak in ptp_clock_register() I got memory leak as follows when doing fault injection test: unreferenced object 0xffff88800906c618 (size 8): comm "i2c-idt82p33931", pid 4421, jiffies 4294948083 (age 13.188s) hex dump (first 8 bytes): 70 74 70 30 00 00 00 00 ptp0.... backtrace: [<00000000312ed458>] __kmalloc_track_caller+0x19f/0x3a0 [<0000000079f6e2ff>] kvasprintf+0xb5/0x150 [<0000000026aae54f>] kvasprintf_const+0x60/0x190 [<00000000f323a5f7>] kobject_set_name_vargs+0x56/0x150 [<000000004e35abdd>] dev_set_name+0xc0/0x100 [<00000000f20cfe25>] ptp_clock_register+0x9f4/0xd30 [ptp] [<000000008bb9f0de>] idt82p33_probe.cold+0x8b6/0x1561 [ptp_idt82p33] When posix_clock_register() returns an error, the name allocated in dev_set_name() will be leaked, the put_device() should be used to give up the device reference, then the name will be freed in kobject_cleanup() and other memory will be freed in ptp_clock_release().
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: a33121e5487b424339636b25c35d3a180eaa5f5e , < f1c96d8085588e1b997a96214b409ac3be20b524 (git)
Affected: a33121e5487b424339636b25c35d3a180eaa5f5e , < 95c0a0c5ec8839f8f21672be786e87a100319ca8 (git)
Affected: a33121e5487b424339636b25c35d3a180eaa5f5e , < 4225fea1cb28370086e17e82c0f69bec2779dca0 (git)
Affected: 5230ef61882d2d14deb846eb6b48370694816e4c (git)
Affected: 6f5e3bb7879ee1eb71c6c3cbaaffbb0da6cd7d57 (git)
Affected: 89e8fc989feaac00bf1a7f9a766289422e2f5768 (git)
Affected: 2dece4d6d13fe179ee3a5991811712725a56e2f7 (git)
Affected: 0393b8720128d5b39db8523e5bfbfc689f18c37c (git)
Affected: bfa2e0cd3dfda64fde43c3dca3aeba298d2fe7ad (git)
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    Linux Linux Affected: 5.5
Unaffected: 0 , < 5.5 (semver)
Unaffected: 5.10.241 , ≤ 5.10.* (semver)
Unaffected: 5.14.15 , ≤ 5.14.* (semver)
Unaffected: 5.15 , ≤ * (original_commit_for_fix)
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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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